Daily use Unix Commands

$uptime <-- To check the system uptime and we get to know that if its rebooted recently with other details.

ps -eaf | grep i<inode> <-- Fetch file using I node number.

ps -eaf | grep i check <-- to get the all inode numbers with file name in PWD.

topas <-To get the usage of  kernel ,cpu,user,idle.

at now <-- to start process manually right away

> <filenname> <-- to make file size as 0 byte or Zero byte .

df -gt . <--To find where the file is mounted on or where its located with file  system usage= Example like :/Home or /Shared.

 where . <-- current path

df -gt <file name or /P /CDW> <-- Directly fetch exact info(file permission,size,created date) file/Dir which u metioned  .

dsmc arch <File Name> <-- To takes bakup on TSM server.

chfs -a size=+10MB /home <--To add 10MB under /Home

ls -ltr <-- To get all list of files /Dir's with file size  in current path.

ls -ld <Dir> <--To get the exact dir.

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Mount unmount nfsmount

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echo $SHELL <-- Command to find the current shell.

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Chown:

For example, the following would transfer the ownership of a file named file1 and a directory named dir1 to a new owner named alice:

chown alice file1 dir1

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SCP Copy the file from SYSMGT04 to SYSMGT02:

$pwd

$sysmgt02

$ scp vrathth@sysmgt04:/home/vrathth/file1 /home/vrathth/

vrathth@sysmgt04's password:

file1                                         100%    0     0.0KB/s   00:00

$ls -l

file1

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$lscfg -v <-- list all the devices with model numbers

sysmgt04: /# getconf DISK_SIZE /dev/hdisk1

140013

sysmgt04: /# who -r <-- runlevel

   .        run-level 2 Dec  5 13:27       2    0    S

sysmgt04: /# lsdev -Pc tape <-- list tape devices

sysmgt04: /# getconf BOOT_DEVICE <-- boot device

hdisk0

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Using the chgrp Command on a File

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# ls -l

total 12

-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt

-rw-rw-r– 1 tclark authors 1310 Jan 13 17:48 gettysburg.txt

-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt

# chgrp presidents gettysburg.txt

# ls -l

total 12

-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt

-rw-rw-r– 1 tclark presidents 1310 Jan 13 17:48 gettysburg.txt

-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt

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Using the chgrp Command on a Directory

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# ls -l

total 4

-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example1.fil

-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example2.xxx

drwxrwxr-x 2 tclark tclark 4096 Jan 13 21:35 examples

# chgrp authors examples

# ls -l

total 4

-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example1.fil

-rw-rw-r– 1 tclark tclark 0 Jan 13 21:13 example2.xxx

drwxrwxr-x 2 tclark authors 4096 Jan 13 21:35 examples

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Change User Ownership

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The chown (change owner) command can be used to change ownership of a file or directory. The syntax is very similar to chgrp.

# ls -l

total 12

-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt

-rw-rw-r– 1 tclark authors 1310 Jan 13 17:48 gettysburg.txt

-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt

# chown abe gettysburg.txt

# ls -l

total 12

-rw-rw-r– 1 tclark authors 2229 Jan 13 21:35 declaration.txt

-rw-rw-r– 1 abe authors 1310 Jan 13 17:48 gettysburg.txt

-rw-rw-r– 1 tclark authors 360 Jan 13 17:48 preamble.txt

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sysmgt04: /home/vdas9am/sample# ls -l <--copying data with file permission.

total 0

-rw-rw-r-x    1 root     system            0 Apr 23 01:00 b

-rw-------    1 root     system            0 Apr 23 01:14 c

sysmgt04: /home/vdas9am/sample# cp -p b c

sysmgt04: /home/vdas9am/sample# ls -l

total 0

-rw-rw-r-x    1 root     system            0 Apr 23 01:00 b

-rw-rw-r-x    1 root     system            0 Apr 23 01:00 c

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$istat mydir  <-- to see all the details abt dir.

$. <file/Dir> <-- to excute the file or dir or Shall (after . one speace should be there)

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etc/inittab

tsm:2:wait <--once it start after other related process will get start if its doesn't start other related process also won't

start.

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What's the command to see the kernel version?

uname -r

uname -a <-- to see all information like machine model

uname -v <-- see OS version

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When we create user then following files are edited

/etc/passwd

/etc/security/passwd

/etc/security/limits

/etc/security/user

/etc/security/.profile

/usr/lib/security/mkuser.default

/usr/lib/security/mkuser.sys

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how to take backup in aix server

Best Rated Answer:

(1)For backup of rootvg, mksysb command can be used on command line or via smitty.

Advantage of mksysb is that it can create a 'bootable' media of the backup of rootvg.

(2) For backup of filesystems, 'backup' command can be used ( restore command to be used for restoration of the backup).

(3) The answer given regarding savevg ( and restvg ) is correct

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How will u create bosboot image (Except bosboot -ad /dev/diskname)?

Best Rated Answer:

There is also a command to create boot image

mkboot -c -d /dev/diskname

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